RadioShack Mono Phono Jack-to-1/8-Inch Stereo Plug Adapter

This audio adapter combines the right and left stereo channels from the 1/8" stereo plug into a single channel on the mono phono jack. The phono jack sends a mono signal to both left and right channels of the 1/8" stereo phone plug. Knurled metal housing. Keep handy for custom audio connections.